opaceDictionary entriesopacus, opaca, opacum:Adjective · 1st declensionFrequency:Frequent= dark, shaded; opaque;Entry →voc. sg. (m.)ExamplesLiber IIP. Vergilius Maro (Vergil) from The Georgics"...agros; nunc altae frondes et rami matris opacant crescentique adimunt fetus uruntque ferentem. iam quae seminibus iactis..."